摘要:
Fluoropolyether rubber compositions comprising (A) a polyfluorodialkenyl compound terminated with alkenyl groups, (B) a perfluoropolyalkenyl compound or a polyalkenylsiloxane compound, (C) a fluorine-modified organosilicon compound having at least two SiH groups, (D) a platinum group compound, and (E) hydrophobic silica powder are suited for injection molding, typically by LIMS. Rubber parts resulting from curing have heat resistance, chemical resistance, solvent resistance, low-temperature properties, high hardness and high strength.
摘要:
A surface on which adsorption of protein (e.g., BSA) is markedly suppressed is provided, by contacting solutions of polymers whose chief component is poly(ethylene oxide) having binding sites to sensor surfaces with biosensor surfaces plural times to link the polymers.
摘要:
A moisture-curable, alkoxysilane-functional polyether urethanes containing a) 20 to 90% by weight, based on the weight of a) and b), of a polyether urethane containing two or more reactive silane groups and one or more polyether segments, wherein the polyether segments have a number average molecular weight of at least 3000 and a degree of unsaturation of less than 0.04 milliequivalents/g, provided that the sum of the number average molecular weights of all of the polyether segments per molecule averages 6000 to 20,000, and wherein the reactive silane groups are incorporated as the reaction product of an isocyanate group with a compound corresponding to the formula b) 10 to 80% by weight, based on the weight of a) and b), of a polyether urethane containing one reactive silane group and one or more polyether segments having a number average molecular weight of 1000 to 15,000.
摘要:
In an adhesive composition comprising (A) a linear perfluoropolyether compound containing at least two alkenyl groups, (B) a fluorinated organohydrogensiloxane containing at least two silicon-bonded hydrogen atoms, (C) a platinum catalyst, and (D) an organosiloxane containing at least one silicon-bonded hydrogen atom and at least one epoxy and/or trialkoxysilyl group, the weight loss of components (A), (B) and (D) are controlled. The composition yields minimized outgassing during heat curing, adheres firmly to various types of substrates including metals and plastics, and cure into products having many advantages.
摘要:
In a first process step, intermediate product dehydration polymerization of a hydrocarbon-based polymer including a metal alkoxide and phosphoric acid is performed to obtain an intermediate product. Then, in a second process step, the intermediate product is irradiated by microwaves with a wavelength that selectively imparts energy to a hydroxyl group included in the intermediate product. As a result, an electrolyte membrane is obtained that is composed from a skeleton formed from a hydrocarbon-based polymer and phosphoric acid that is proton conductive.
摘要:
The cure-through rate of one-part silylated polymer adhesive/sealant compositions is improved by the addition of a small but effective amount of an alcohol-free hydrophilic solvent. The composition is particularly suitable for packaging in aluminum or aluminum-lined cartridges.
摘要:
It is an object of the present invention to provide a curable composition capable of providing good rubber-like mechanical properties with low stress and high elongation, without sacrificing tack, recovery, curability, weathering resistance, storage stability and other characteristics.This invention relates to a curable composition which comprises (a) an oxyalkylene polymer containing at least one reactive silyl group per molecule thereof and (b) a compound having an intramolecular .alpha., .beta.-diol or .alpha., .gamma.-diol structure.
摘要:
The present invention relates to a method of preparing an aerosol suppressant composition and to use of the composition to reduce or suppress silicone mist in high speed coating processes and significantly increase the adhesion of the coating to the substrate. More particularly, the present invention relates to a method of preparing an aerosol suppressant composition by reacting an organosilicon compound, an oxyalkylene containing compound, and a catalyst. The composition, when added to curable silicone coatings, reduces the amount of silicone mist in high speed coating processes.
摘要:
Fluorinated amide compounds of formula (1) wherein Rf is a perfluoroalkyl or perfluoropolyether group having 1 to 800 carbon atoms, R is hydrogen, methyl or phenyl, and letter a is 1, 2 or 3 are novel and useful as a modifier intermediate capable of improving various properties of silicone and liquid fluororubber. ##STR1##
摘要:
An improved aqueous electrocoating composition that contains an anticrater agent which is a reaction product of polyoxyalkylene diamine and isocyanto alkyl alkoxy silane which is hydrolyzed and has a number average molecular weight of about 2,000-5,000; electrodeposited finishes are formed that have a significant reduction in craters and are smooth and even finishes.